Improvement in machinery for turning bowls



UNITED v STATES PATENT OFFICE.

PARLEY HUTCHINS, JR., VOF WORTHINGTON, MASSACHUSETTS.

IMPROVEMENT IN MACHINERY FOR TURNING BWLS.

Specification forming part of Letters Patent No. 5,306, dated September25, 1847.

To all whom t may concern:

Be it known that I, PARLEY HUTcHINs, J r., of Worthington, in the countyof Hampshire and State of Massachusetts, have invented a new and usefulMachine for Turning Wood Bowls or Dishes; and I do hereby declare thatthe following is a full, clear, and exact description of theconstruction and operation of the same,referencebein g had to theannexed drawings, making a part of this specification, in Which- Figurelis a perspective View; Fig. 2, a top view, with part of machine takenout.

The letters are the same forthe same parts in both views. Y

The nature of my invention consists in turning bowls or dishes fromblocks of wood or any other suitable material by means of one or moreknives shaped in a curved form and placed ina frame made for holdingthem, which frame being' made fast to the middle of a semicircular arm,said arm having cogs or teeth which are operated upon by an endlessscrew for the purpose of moving the said semicircular arm andknife-frame up to the revolving block of wood for the purpose of turningolf bowls or dishes, as set forth and hereinafter described.

A represents the chuck, on which the block of wood is secured and fromwhich the bowls or dishes are to be turned; B, pulley, which givesmotion to the chuck A; @stationary bottom piece; g g, standards formandrel, which contains the chuck; C', movablefbottom con tainingendless screwD and semicircular arm E with knife-frame F.

The bottom of movable frame C moves on slides a a; e e, dac., cogs orteeth on semicircular arm E, knife-frame F fastened to the middle of thesemicircular arm E at one end, the other end turning upon pivots d d; GG,

Adto., turning-knives; H, lever for securing rmly the knife or knives;I, movable piece containing the gouge Jy K, screw for regulating thegouge; L, spring which acts upon the movable frame C', M M, pins whichprevent the movable frame from sliding too far.

V is a setscrew,which, in conjunction with the clasp W on the center-pinU, adjusts the chuck and center pin longitudinally, and thereby movesthe block of wood with regard to the knife so as to determine entirelyor in conjunction with the sliding frame C the thickness of the bowl tobe cut. l

To enable others skilled in the art to make and use my invention, I willproceed, to describe its lconstruction and operation.

The chuck A is elevated to a properl height for the operation of themachine, being fixed on onelend of a mandrel 'l with a set-screw V.

The other end of the mandrel receives the pulley B, by which motion isgiven to the chuck A, holding the piece of wood from which bowls ordishes maybe turned. A center-pin U holds wood by means of the endlessscrew D, acting A upon cogs or teeth e e, dac., on the outside of a partof the semicircular arm E. The other part of said arm E and nearest tothe chuck A contains a gouge J, secured to a movable piece I. The gougeis for the purpose of turning off the outside of the round part of theblock, as represented in the annexed drawings, an'd which is doneprevious to putting the knives in their frame.

The movable piece I, containing the gouge J, works upon a pivot f, andis moved forward or backward by means of a screw K, as described above.l i

I make the turning-knives in any of the known modes for turning curves,and curve them to suit a small or large curve, having one for every sizebowl or dish that I Wish to turn or cut from a block of Wood. Theturningknife is fastened to a piece o'f wood or iron, and is let or setinto the knife-frame F, then held to its place by the lever H until theoperation of cutting or turninga bowl is completed. It is then lifted upand the knife taken out, when a smaller knife is substituted for cutting a smaller bowl .from the piece of wood yet left unturned, &c.

To facilitate the operation of turning 0E bowls or dishes, as abovestated, I employ one, two, three, four, or more knives at a time byputting them in one frame, andV cause each knife to turn off its ownbowl or dish, as

shown in Fig. 2 of the annexed drawings, and

any number.' of knives are, when properly varranged in said frame, heldtogether and made permanent by means of said lever H, as beforedescribed, and, as in case where only one knife is used.

The operation of my machine is commenced by setting the pulley B inmotion, which turns the mandrel which contains the chuck A, whereon thatpiece of wood or block is affixed from which it is intended to turnbowls or dishes. The semicircular arm E is moved around by means of theendless screw D working in the cogs e e, dac., on the periphery of apart of the semicircular arm E toward the chuck A, thereby bringing theknife or knives in knife-frame in contact with the block of Wood whichis revolving` rapidly, causing the knives to enter and cut one or morebowls or dishes in a very short time, using one or more knife or knivesfor the performance of the above said operation. The mandrel T, itssetscrew V, and the center-pin U and itsfclasp W are intended' tooperate in conjunction with the frame C and its fixtures in determiningthe thickness of the bowls or dishes to be cut when one knife is used.The movable frame C', containing the semicircular arm E, knifeframe F,endless screw D, &;c., runs upon the slides a, a. The object of thisarrangement is to assist in accommodating the knife to the thickness andsize of the block of wood and to assist in varying the thickness andsize of the bowls or dishes. This is accomplished by the set-screw S,which moves the platform G toward or from the chuck A, and this motionbrings the knife nearer to or farther from the external surface of theblock. v

Having thus fully and clearly described the construction and operationof my machine for turning wood bowls or dishes,what I claim as myinvention,and desire to secure by Letters Patent, is-

The combination of the semicircular arm E with the knife-frame F,holding one or more knives, and adjustable piece I, holding the gouge J,for the purpose of turning wood bowls or dishes, and, infcombinationtherewith. the

.manner of regulating the thickness and size of bowls or dishes to beturned off. by means of the sliding or movable bottom C and theadjustable mandrel T and center-pin U, for

the purpose of turning Wood bowls or dishes, in

the manner as herein set forth and described.

September 15, 1847.

PARLEY HUTCHINS, JR.

Attest:

D. WALKER, T. M.` MILBURN.

